Has anyone had any experience with the riverside gear M21 overdrive kit? Ratios are as follows, 1st gear 2.20:1, 2nd gear 1.50:1, 3rd is 1 to 1, 4th position becomes .87 for a final of 13% overdrive out the tailshaft.
http://www.riversidegear.com/categor...oduct-166.html (http://www.riversidegear.com/categories/muncie-4-speed/products/product-166.html)

I have that in my autogear tranny , works great , just wish 1st gear was alittle lower